# Heatmap Derivative aggregation not available

**URL:** <https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924>\
**Category:** Kibana\
**Created:** [August 13, 2020, 5:13pm UTC](https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924 "2020-08-13T17:13:16Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![ulfsa](https://avatars.discourse-cdn.com/v4/letter/u/e480ec/32.png) [@ulfsa](https://discuss.elastic.co/u/ulfsa)\
**Post date:** [August 13, 2020, 5:13pm UTC](https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924/1 "2020-08-13T17:13:17Z")

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I enjoy using Heatmaps to visualize (non) change. In a heatmap of a thousand cells, the human eye can immediately spot any outliers.

I would like to visualize the delta of log data such as total bytes written. I would assume Derivative aggregation is the way to go here.

This works just fine with Line charts: for the Y-axis, I can select Aggregation to Parent Pipeline Aggregation --\> Derivative and then choose the total bytes written document field.

For Heatmap charts, there are no Parent Pipeline Aggregations available in the dropdown for the Metrics Value -- only the Metric Aggregations such as Average, Count etc are available.

Is this proper behavior?

Stack: ES 7.8.0, Kibana 7.8.1.

Please advise. Thank you.

 ![kibana line derivative](https://us1.discourse-cdn.com/elastic/original/3X/9/1/917b7c97b547fecf71e4d2d6f163a41bc7cbf623.png)

 ![kibana heatmap no derivative](https://us1.discourse-cdn.com/elastic/original/3X/6/d/6d8390b35a9dc556e73465f44ea63b8da48e9d60.png)

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**Author:** ![ulfsa](https://avatars.discourse-cdn.com/v4/letter/u/e480ec/32.png) [@ulfsa](https://discuss.elastic.co/u/ulfsa)\
**Post date:** [August 14, 2020, 5:59am UTC](https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924/2 "2020-08-14T05:59:29Z")

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Additional info: at least in the documentation for 6.8, it shows Parent Pipeline Aggregations should be possible: [https://www.elastic.co/guide/en/kibana/6.8/heatmap-chart.html](https://www.elastic.co/guide/en/kibana/6.8/heatmap-chart.html).

Quote: You can add an aggregation by clicking the **+ Add Metrics** button.

Unfortunately the Add Metrics button is not visible.

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**Author:** ![flash1293](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/flash1293/32/41227_2.png) [@flash1293](https://discuss.elastic.co/u/flash1293)\
**Post date:** [August 18, 2020, 8:30am UTC](https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924/3 "2020-08-18T08:30:32Z")

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This is a known feature request, but unfortunately it's not possible right now: [https://github.com/elastic/kibana/issues/12171](https://github.com/elastic/kibana/issues/12171)

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 15, 2020, 8:30am UTC](https://discuss.elastic.co/t/heatmap-derivative-aggregation-not-available/244924/4 "2020-09-15T08:30:42Z")

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